<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>盒子模型</title>
		<style type="text/css">
			.hezi{
				width: 200px;
				height: 200px;
				border: 1px solid;
				margin: 10px;
				padding: 10px;
			}
		</style>
	</head>
	<body>
		<div class="hezi">
			hahahh
		</div>
	</body>
</html>
